Graco Reactor H-VR, Repair And Parts Manual

Page: 11 / 70

Temperature Control Diagnostic Codes
313540L 11
4. Remove connector B from temperature control mod-
ule, and check continuity of overtemperature
switches A and B, thermocouples A and B, or FTS
by measuring resistance across the pins on the plug
end; see T
ABLE
1.
NOTE: Before doing the following checks, note
which zone (A, B, FTS, or all) has high fluid tempera-
ture.
5. Verify fluid temperature, using an external tempera-
ture sensing device.
• If temperature is too high (sensor reading is
229°F [109°C] or above):
6. Check if thermocouples A and B are damaged, or
not contacting the heater element, page 39.
7. To test that temperature control module turns off
when equipment reaches temperature setpoint:
a. Set temperature setpoints far below displayed
temperature.
b. Turn zone on. If temperature rises steadily,
power board is failing.
c. Verify by swapping with another power module.
See Replacing Temperature Control Assem-
bly Modules , page 37.
d. If the swapped module does not fix the problem,
the power module is not the cause.
8. Verify continuity of heater elements with an ohmme-
ter, see page 38.
E02: High zone current
1. Check hose connections for electrical short, page
40.
2. Exchange zone module with another one. Turn
zone on and check for error (see page 37). If error
disappears, replace faulty module.
a. For hose zone: If error still occurs, perform
Transformer Primary Check and Trans-
former Secondary Check , starting on page 42.
NOTE: When there is a high current error, the LED
on that zone’s module will turn red while the error is
displayed.
E03: No zone current
1. Check for tripped circuit breaker inside electrical
cabinet or at power source for that zone. Replace
circuit breaker if it trips habitually.
2. Check for loose or broken connection at that zone.
3. Exchange zone module with another one. Turn
zone on and check for error (see page 37). If error
disappears, replace faulty module.
4. If E03 occurs for all zones, the contactor may not be
closing. Verify wiring from heater control to contac-
tor coil.
a. Hose zone : test hose continuity, page 40.
b. Perform Transformer Primary Check and
Transformer Secondary Check , starting on
page 42.
NOTE: When a no current error occurs, the LED on
the specific zone’s module turns red when the error
is displayed.
Table 1: Sensor Connector Continuity Checks
Pins Description Reading
1 & 2 OT switch A nearly 0 ohms
3 & 4 OT switch B nearly 0 ohms
5 & 6 Thermocouple A 4-6 ohms
8 & 9 Thermocouple B 4-6 ohms
11 & 12 FTS approximately 35
ohms per 50 ft (15.2
m) of hose, plus
approximately 10
ohms for FTS
10 & 12 FTS open